About Concretum Operis
Over 20 years of structural excellence in specialty concrete and heavy construction.
From the Ground Up.
For Over 20 Years.
Concretum Operis was founded in Richmond, California, with a clear vision: to build more than structures — to build trust. For over 20 years, we have been part of Richmond's growth, delivering high-quality concrete solutions for residential, commercial, and industrial projects.
What began as a commitment to doing the work right has grown into a legacy reflected in every project we complete. Our track record isn't measured in years alone, but in the structures that stand the test of time and the clients who come back.
The Values
That Guide Us
These five values are non-negotiable. They shape how we bid, how we build, and how we treat everyone we work with.
Integrity
We do what we say. Every budget, schedule, and commitment is built on honesty — with our clients, our partners, and our team.
Craft Excellence
Precision isn't optional. From the first foundation pour to the final inspection, we hold every detail to the highest standard because the work has to last.
Accountability
We own our results. When challenges arise, we face them head-on and take responsibility for delivering solutions, not excuses.
Sustainability
We build with the future in mind — reducing waste, choosing responsible materials, and making decisions that benefit our clients and the environment alike.
Trust
Relationships matter as much as structures. We earn trust project by project, through transparency, communication, and consistent follow-through.
What Drives Us
Forward
Because doing the work right is not an option — it's our promise.
At Concretum Operis, we combine technical expertise with genuine closeness to our clients, so every project reflects durability, precision, and excellence. We bring to life the vision of those who trust us, with solid, lasting solutions.
Because excellence isn't announced — it's built.
To be the most trusted general contractor in the San Francisco Bay Area, recognized for the solidity of our work and our genuine commitment to every client. We aspire for every structure we build to speak for itself.
The Crew Behind
Every Pour
Our strength is our people. Decades of combined field experience, engineering knowledge, and a shared commitment to doing the work right.
Roberto González
Roberto is the founder of Concretum Operis and the driving force behind over 20 years of work in construction. He started from the ground up at 17 as a field worker, advanced to superintendent, and used that experience to build the company from scratch. His hands-on knowledge of the trade and his leadership have made Concretum Operis a trusted name in Richmond.
Tanya Fernández
Tanya is a key member of the Concretum Operis administrative team. She is responsible for providing executive support, attending to clients, and coordinating daily processes to ensure every project moves forward without setbacks. Her organization and commitment reflect the values of trust and excellence that define the company.
Joel Gallegos
Joel ensures that every project is executed from start to finish without issues. As Project Manager, he coordinates directly with clients, contractors, and engineers, maintains clear communication at every stage, and represents Concretum Operis during site inspections. His professional and team-oriented attitude make him an essential part of every job.
Reinier González
Reinier leads the estimating department at Concretum Operis. He is responsible for preparing detailed budgets, analyzing blueprints, and ensuring that every proposal accurately reflects the real cost of the project. He works closely with clients, developers, and engineers to deliver competitive, well-planned solutions from the very start.
Let's Talk About Your Project
Reach out for a no-obligation consultation. We'll review your plans and provide a detailed, transparent estimate.